Patent US3623431A successfully refreshed from Google Patents.
US3623431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shot shell
Assignee: Individual
•
Filing: 1968-07-15
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Granted: 1971-11-30
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Expires: 1988-07-15
Abstract
Abstract A SHOT SHELL INCLUDING A CARTRIDGE CASE, A PRIMER, A POWDER CHARGE, SHOT AND A WAD. THE WAD IS FORMED OF FLEXIBLE SHAPE-RETAINING PLASTIC AND HAS A CLOSED AIR CHAMBER WHICH PERMITS THE PARTIAL COLLAPSE OF THE WAD DURING DETONATION OF THE POWDER CHARGE.
Inventors
- 👤 Grover E Hendricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:20
CPC Classifications
F; F42; F42B; F42B7/00; F42B7/02; F42B7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |